If you’ve been to the airport recently, you might have noticed something different while going through security: a TSA agent taking your photo. More than 200 US airports are now using facial recognition technology to identify passengers. Face scans can speed up the security process, but according to Dr. Joy Buolamwini, this technology comes with big picture risks. She explains what’s going on with these face scans — and how to opt out.

Read more about Dr. Joy’s nonprofit, the Algorithmic Justice League, here.

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